Emil gathmann



E. GATHMANN.

1,019,244. Patented Mar.5, 1912.

I I A a Home I x -W/M Q1 a\\ dfc EMIL GATHMANN, OF NEW YORK, N. Y.

INGOT-MOLD.

Specification of Letters Patent.

. Patented Mar. 5,1912.

Application filed August 15, 1911. Serial No. 644,103.

To all whom it may concern:

I Fig. 2 is a similar'view of another form of Be it known that I, EMIL GATHMAnN, a l mold with my improvements applied show citizen of the United States, residing in the clty, county, and State of New York, have invented certain new and useful Improvements in Ingot-Molds, of which the following is a specification.

My invention relates to certain improve- 'ments 1nthe construct-ion of ingot molds and in the stools for sealing the lower portion or bottom of the mold chambers.

The invention particularly relates to molds of this class .in which the larger part of the mold is uppermost. Molds of this kind are open at top and bottom, the bottom being closed when casting by means of a stool on-which the mold rests. Inasmuch as the mold is separable from the stool, the molten metal will leak from the mold chamber unless some means be provided for sealing the joint between the mold and thestool.

, Heretofore this has been accomplished by a fire-brick or clay construction which is not only expensive but 1t 1s lnsuflicient, because often some dampness or molst-ure remains in the fire clay which, when the metal is teemed produces steam that enters the mol ten metal, becomes dissociated and forms gases which produce blow holes that will greatly impair the ingot. Furthermore when the bottom of themold rests on a metallic stool it is practically impossible in.

this way to providean absolute'seal and some of the moltenmetal leaks out laterally from the mold chamber and forms a fin at the lower part of the ingotv producing a con-- struction which makes it difficult to strip the ingot from the mold.

According to my invention I form a seal within the mold chamber which effectively prevents the egress of the molten metal therefrom. Preferably the stool is formed with a part which projects into the lower portion of the mold chamber and the seal is formed by refractory material which surrounds the projection. Preferably also the seal extends beneath the lower or base walls of the mold and underneath the lower outer portion of the mold chamber and in one form of the invention the stool is formed with a flange which surrounds the projection and which enters a recess or groove in the bottom of the mold walls.

In. the accompanying drawings, Figure 1 is a vertical central sectionthrough an ingot mold embodying my improvements.

ing the stool resting on a transfer car. The mold shown in Fig. 1 is preferably so so constructed as to prevent the formation of pipes or blow-holes in the ingot. This feature of my invention is however described and claimed in other patents granted to me.

Referring to Fig. 1, the mold body A rests on a stool B of novel construction. a indicates lifting lugs and a trunnions. The stool is provided with an upwardly projecting centrally arranged part I) which enters the lower portion of the mold chamber. The diameter of the projection" is less than that of the mold chamber leaving a surrounding space w which is filled with fire-clay, molders earth or thelike, y. Preferably a groove b is made to surround the lower part of the projection b and a'flange 'or rib a surrounds ported on soniIthin else In assernbliii ft afrts refra terial is placed I I W space as around ith'e projection bQ- th'en" the mold is lowered onto the stool and the sea1- ing medium will assume the, condition in dicated. When the mold is teemed the molten metal will bear heavily upon the seal, but no metal can pass laterally out of themold chamber or beneath the mold walls and thus the production of lateral fins which would interfere withthe stripping of the mold is prevented.

In Fig. 2 the stool B is shown'mounted on a car C resting on rails D. In this case the stool is formed with a part b which enters the mold chamber and a recess it formed around the projection which extends below the plane of the bottom of the mold walls. The bottom of the recess is inclined upward and outward and the bottom of the mold walls is similarly inclined but more gradually. The space as surrounding the projection 6 within the mold. chamber is filled with refractory material y and the space belowthe mold and above 7 the bottom of the groove or recess h is similarly filled. The mold rests on the stool at the outer edge thereofsurrounding the groove h. In this case also the leaking of metal laterally below the mold is prevented as the sealing medium can never sink sufficiently to allow any metal to pass out laterally from the mold. In Fig. 2 the mold A shown as being provided with lifting lugs a i a In operating with either of the molds shown in Figs. 1 or 2, after the teeming of theingot the car 0 is taken to the stripping department and the mold with the contained ingot is "lifted from the stool B by crane mechanism of Well known kinds.

I claim as my invention:-

1. A metallic ingot mold separably' connected with a metallic stool having a part projecting into the lower portion of the mold chamber which is out of contact with the vertical walls of said chamber and is provided with means for preventing the molten metal of the ingot from passing laterally outward from. said chamber.

2. A metallic ingot mold separably connected with'a metallic stool having a part projecting, into thelower portion of the mold chamber which is out of contact with the vertical walls of said chamber and which has sealing means surrounding its 1 vertical walls.

3. A metallic ingot mold separably connected with a metallic stool having a part projecting into the lower portion of the mold chamber and having sealing means located between the lower vertical chamber walls of the mold and the inwardly projecting portion of the stool.

4. An ingot mold separably connected 4 with a stool having a part projecting into of refractory material interposed the mold chamber and having sealin means etween the vertical Walls of the mold and said pro- .ecting part.

5. A chambered mold resting on and separably connected with a stool having a part projecting into the mold chamber surrounded by a groovewhich extends below the mold base and underneath the lower outer portion of the mold chamber and which groove is filled with sealing material.

gutter adapted to extend below the mold base and underneath the lower portion of the mold chamber. 7

. 7. A metallic stool for ingot molds having a part adapted to project into the lower portion of the mold chamber, said projecting part being surrounded by a groove or gutter adapted to extend below the mold base and underneath the lower outer portion of the mold chamber, in combination with sealing material placed in said groove or gutter.

8. A metal stool for chambered ingot molds provided with an annular groove or gutter adapted to extend below the mold base and underneath the lower outer portion of the mold chamber.

9. A metallic stool for chambered ingot molds providedwith an annular groove or gutter adapted to extend below the -mold base and underneath the lower portion 'of v EMIL GATHMANN. Witnesses:

ANNA M. HOFFMANN. H. L. CADMUS. 

